Printed Digital Dentures – Future or Alternative?

Why print a denture instead of traditional methods?

Printing a denture offers the possibility of:

• Speed – ready denture in 3–5 days (vs. 7–10 for traditional)
• Precision – dimensions consistent with CAD design to ±0.2 mm
• Reproducibility – every printed denture is identical (if the CAD model is identical)
• Design changes – if something needs to be changed, only the CAD file is modified (vs. making a new wax model)

Printing technology – how are dentures printed?

Process:

1. Scan of the patient's tooth/model (intraoral scanner or scanned physical model)
2. CAD design (we design saddles, rests, geometry)
3. Printing (SLA / DLP technology – photopolymerization of resin layer by layer)
4. Post-processing (cleaning, polishing, UV curing)
5. If necessary – attaching teeth to the printed framework (sometimes teeth are printed together with the framework)

Printing materials – what are they used for?

Resin (standard)

Standard for 3D printing in dentistry. Transparent or colored resin.

Properties:

• Durability: medium (will not withstand long-term bruxism)
• Accuracy: up to ±0.2 mm
• Water absorption: medium (denture may subtly deform)

Fiber-reinforced resin

Newer material – resin with mixed glass or carbon fibers.

Properties:

• Durability: high (approaching traditional)
• Accuracy: up to ±0.15 mm
• Water absorption: low (dimensionally stable)
• Cost: 20–30% higher

Printed Nylon

Nylon (TPE) printing using powder-based technology (laser-sintered powder).

Properties:

• Flexibility: high (similar to classic nylon)
• Durability: high
• Water absorption: minimal
• Cost: high (similar to traditional nylon)

Advantages of printed dentures

1. Speed – ready in 3–5 days (ideal for urgent cases, patient is waiting)
2. Precision – tolerances up to ±0.2 mm, rests precisely where needed
3. Reproducibility – a second denture will be identical (if the patient's condition changes = we print another)
4. Design changes – if occlusal height needs adjustment, modify the file and print a new one
5. Less waste – traditional dentures require burnout (sometimes several iterations), printing is more efficient
6. Personalization – we can print various colors, structures (e.g., mandibular gum texture)

Disadvantages of printed dentures

1. Durability – standard resin will not last 10+ years like metal or traditional acrylic (typically 3–5 years)
2. Water absorption – resin absorbs water, can deform after 2–3 years
3. Brittleness – less resistant to drops / bruxism (vs. metal, traditional acrylic)
4. Repair – printed dentures are harder to repair in the clinic (must be sent to the lab)
5. Upfront cost – a 3D printer is a laboratory investment (if the lab has to buy a printer)
6. Color change over time – color may change after sun exposure (resin yellows)
7. Cleaning – requires gentle handling (no hot solvents)

When to use a printed denture, when traditional?